nano

nano with my custom patches
git clone git://bsandro.tech/nano
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haskell.nanorc (1009B)

      1 ## Syntax highlighting for Haskell files.
      2 
      3 ## Original author:  Alex Taber
      4 ## License:  GPL version 3
      5 
      6 syntax "haskell" "\.hs$"
      7 comment "--"
      8 
      9 # Keywords
     10 color red "\<(as|case|of|class|data|default|deriving|do|forall|foreign|hiding|if|then|else|import|infix(l|r)?|instance|let|in|mdo|module|newtype|qualified|type|where)\>"
     11 
     12 # Various symbols
     13 color cyan "\||@|!|:|_|~|=|\\|;|\(\)|,|\[|\]|\{|\}"
     14 
     15 # Operators
     16 color magenta "==|/=|&&|\|\||<|>|<=|>="
     17 
     18 # More symbols
     19 color cyan "->|<-|=>"
     20 color magenta "\.|\$"
     21 
     22 # Data constructors
     23 color magenta "\<(True|False|Nothing|Just|Left|Right|LT|EQ|GT)\>"
     24 # Data classes
     25 color magenta "\<(Bounded|Data|Enum|Eq|Floating|Fractional|Functor|Integral|Monad|MonadPlus|Num|Ord|Read|Real|RealFloat|RealFrac|Show|Typeable)\>"
     26 
     27 # Special keyword
     28 color brightred "undefined"
     29 
     30 # Strings
     31 color yellow ""([^"\]|\\.)*""
     32 # Characters
     33 color brightyellow "'([^'\]|\\.)'"
     34 
     35 # Comments
     36 color green "--.*"
     37 color green start="\{-" end="-\}"
     38 
     39 # Trailing whitespace
     40 color ,green "[[:space:]]+$"